What are the most important ingredients in Mylanta?

The active ingredients in Mylanta are aluminum hydroxide, magnesium hydroxide, and simethicone. These ingredients work together to neutralize stomach acid and relieve gas pain. Aluminum hydroxide and magnesium hydroxide are antacids, which means that they help to reduce the amount of acid in the stomach. Simethicone is an antiflatulent, which means that it helps to break up gas bubbles in the stomach and intestines.